I'll go to say that GM transmissions seem to all do this. My 19 Silverado with an 8 speed will delay shifting from 1 - 2 when it's cold. As in, you can feel that it wants to shift but it takes 2 or 3 seconds before it'll shift which makes it feel like it's slipping.
I think this topic about the A10 shifting hard or slipping in certain gears, mainly 2nd, 3rd or 4th, under normal driving was talked about. Can't remember what was really said but I'll see if I can find it.
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